We ship over a 1000+ packages and day and run a On Demand Print model for our Apparel fulfillment.
We would love to see a feature added to ShipStation that you can add custom "Status" to a line item on an order that can be easily filtered.
For example- An order comes in with item that multiple items. We would be able to change status of line items to "Pulled from Inventory". "Out of Stock", or "On Demand Print" etc. Then be able to run a Pick List of items needed to be printed or ordered.